I have the helium party tanks and the hood. My question which I have asked before is what happens when the helium runs out. For example. I bought a tank and turned it on full. The helium came out pretty quick and I was firstly unsure if the helium would blow off the hood which I had read in another site? Â However I was also wondering because the gas ran out within minutes. So I was wondering if it would be equally effective if the gas was released more slowly? i.e dont turn the nozzle all the way round. Â Would this still keep the required supply to the hood? Also after someone becomes unconscious ( a few seconds ), it will take around 5-10 minutes before death. What happens if the helium tanks run out. Do you still keep or re-breath the helium in the hood? I have seen that two party balloon kit tanks are the required amounts. So in essence, not forgetting the above questions, Â if you follow all the instructions, even though you have the hood on with the helium inside, what happens when the helium runs out?